This Slim Circular Polarizing Filter from Ice features an ultra-slim 127mm rotating aluminum filter ring for use in wide-angle prime and zoom lenses without vignetting. It includes front filter threads to allow attaching additional filters or a lens hood. A circular polarizing filter creates a contrast between blue sky and clouds for dramatic deep blue skies, and it also cuts glare off reflected surfaces such as water and polished metal. Made of high-quality optical glass, this filter can rotate for different levels of polarization.